| Abstrakt: |
The effects of molecular structure on the redox properties are explored by the cyclic voltammetry and spectroscopy using the thin films of organic electroluminescence materials of poly(9,9′-dioctyl-2,7-fluorenediyl vinylene-co-9-cyanamide-2,7-fluorenediyl vinylene); PFVYCFV, poly(9,9′-dioctyl-2,7-fluorenediyl vinylene 2,5-dicyano-1,4-phenyl vinylene); PFVDPV and poly(9,9′-dioctyl-2,7-fluorenediyl vinylene 2,3,5,6-tetracyno-1,4-phenyl vinylene); PFVTPV. The PFVYCFV, PFVDPV and PFVTPV show the UV/visible absorption maxima at 413 nm, 448 nm and 400 nm, respectively. Photoluminescence (PL) of these materials is blue-green color. The measured electrochemical ionization potential and electron affinity of these materials are 5.72 eV/3.19 eV for PFVYCFV, 5.79 eV/3.26 eV for PFVDPV and 5.62 eV/3.48 eV for PFVTPV. The electochemical bisection (oxidation & reduction) energy gaps of PFVYCFV, PFVDPV and PFVTPV about PL onset are 2.93 eV, 2.97 eV and 3.08 eV that are 5.09 eV & 2.97 eV, 5.89 eV & 2.92 eV and 6.17 eV & 3.09 eV with respect to vacuum level, respectively. [ABSTRACT FROM AUTHOR] |
